Should `xarray:storage_options` be split to a separate extension?

[TomAugspurger]

One of the fields currently in this extension is xarray:storage_options. This describes additional options necessary to open an fsspec URI.

Should that go in its own repository / stac extension? fsspec-style URLs are usable by libraries other than xarray. For example, pandas uses it on its non-HTTPs backend, Zarr can use it independently of xarray.

I really only stuffed it here because creating two repositories with one field each sounded like an unnecessary amount of overhead. But I can split things if we think it would be useful.